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"No Model.)

W. N. SAWYER. FEED ROLLER FOR WOOD PLANING MACHINES.

No. 519,739. Patented May 15 1 894.

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UNITED STATES PATENT OFFICE.

WILLARD N. SAl/VYER, OF VVINOI-IEN DON, MASSACHUSETTS, ASSIGNOR TO BAXTER D. WHITNEY, OF SAME PLACE.

FEED-ROLLER FOR WOOD-PLANING MACHINES.

SPECIFICATION forming part of Letters Patent N 0. 519,739, dated May 15, 1894.

Application filed July 8, 1893. semi 110.4%,950. (No model.)

To aZZ whom, it may concern.-

B e it known that I, WILLARD N. SAWYER, a citizen of the United States, residing at; Winchendon, in the county of, Worcester and State of Massachusetts, have invented a new and useful Improvement in Feed-Rollers for Wood-Planing Machines, of which the followng 1s a specification, accompanied by drawlugs, forming a part of the same, and in which- Figure 1 represents in front elevation, a roller embodying my invention. Fig. 2 represents a sectional view on line 2, 2, Fig. 1.

Fig. 3 represents a sectional view on line 3, 3,

Fig l. Fig. 4 represents one of the annular sections of the feed roller removed from the central shaft, and Fig. 5 is asectional view of the same on line 5, 5, Fig. 4.

Similar letters refer to similar parts in the different figures.

My present invention relates to that class of feed rollers, which consist of a series of an'nularsections carried upon a common shaft, or arbor and normally held concentrically with the central shaft, but capable of yielding to a pressure applied radially to the periphery of the sections so that when strips or boards of varying thickness are fed by the roller, the annular sections of which the roller 1s composed, will yield independently to accommodate themselves to the different thicknesses of material acted upon by the roller; the central shaft and each of the annular sections being operatively connected,

so a rotative movement will be imparted to each of the sections by the rotation of the central shaft.

A feed roller of the character I have described is shown and described in Letters Patent of the United States No. 459,325, granted to B. D. Whitney September 28, 1891; and my present invention is designed to be an improvement upon the roller therein shown.

The feed roller forming the subject of my present invention comprises a central shaft A, provided with aseries of radial blades A, projecting from its periphery surrounded by a series of annular sections 13, the outer faces of which form the exterior surface of the feed roller. Each of these sections is provided with an internal notched flange B projecting from one edge of the section and provided with a series of wings B extending from the inner edge of the internal flange parallel and concentric with the annular section B.

The interior diameter of the wings B is greater than the diameter of the central shaft A, in order to allow the sections when under radial pressure to be moved eccentrioally to the central shaft; and the exterior diameter of the wings B is equal to the diameter of the circle inclosing the ends of the radial blades A. \Vhen the annular sections are applied to the central shaft in their normal position concentric with the shaft, the radial blades A enter thenotches B in the internal flange B and between the wings B with the advancing side of each of the blades A in contact with the rear edge B of the wings 13, causing the rotation of the shaft to be imparted to the annular sections.

Each of the annular sections B is normally held concentrically with the central driving shaft A, by means of an elastic split ring C, forming an annular spring which is carried upon the outside of the wings B with its edge resting against the internal flange B and with the inner surface of the spring in contact with the ends of the radial blades A, which determine the concentric position of the annular spring 0, with reference to the central driving shaft A and the contact if the outer surface of the wings B with the inner surface I of the annularspring 0 serves to hold the sec-.

tion 13 concentric with the driving shaft.

When the tension of the spring 0 is overcome by a force applied radially to the outside of one of the sections 13, that section will be moved into a position eccentric to the central shaft and the contact between the blades A and the wings 13 will be broken, except upon one side of the central shaft and by the blade, or blades lying nearest a plane at right angles with the plane in which the radial force is exerted; for example, if one of the sections B Fig. 3 were raised by a strip, or

board D passing beneath the section would 0 would be expanded and carried out of con- Ioc tact with the tips of the blades A upon the side opposite that to which the radial force is applied and the contact of all the blades A and wings B2 will be broken except upon the side of the rotating section approaching the strip D, where is located the blade A, which lies nearest a plane at right angles to the plane in which the radial force is exerted upon the section; the blade A serving as a fulcrum to hold one side of the section and causing its eccentricity of movement to take place upon the opposite side of the section. When the radial force is removed, the tension of the elastic spring 0 assumesits true cylindrical shape and the wings B are again brought concentric with the blades A, as represented in What I claim as my invention, and desire to-secnre by Letters Patent, is-

1. In a surface yielding roll, the combination of a central driving shaft provided with a series of radial blades, an annular spring bearing againstthe end of said blades, whereby said spring is held concentrically with said shaft, and annular sections surrounding said central shaft, said sections being engaged by said annular spring, whereby they are held concentrically to said central shaft,substantially as described.

2. In a surface yielding roll, the combination of a central driving shaft, provided with a series of radial blades, an annular spring encircling and bearing against the ends of said blades, whereby said spring is held concentrically with said shaft, an annular section surrounding said shaft, said section having an internal flange and a series of wings projecting therefrom and bearing against the inside of said annular spring, whereby said annular section is held concentrically with said central shaft, yet being susceptible to eccentric movement, substantially as described.

3. In a surface yielding roll, the combination of central driving shaft A, radial projecting blades A, annular section B provided with an internal notched flange B to receive said blades, wings B projecting from said flange and arranged concentrically to said annular section, and an elastic split ring inclosing said wings, and bearing against the ends of said blades, whereby said annular section is held concentrically with said driving shaft, but is capable of an eccentric movement by the yielding of said elastic ring, substantially as described.

Dated this 7th day of July, 1893.

WILLARD N. SAVVYER.

Witnesses:

GEO. M. WHITNEY, M. A. YOUNG. 

